KR102527738B1 - Receiving apparatus, receiving method, transmitting apparatus and transmitting method for location-based filtering of emergency information - Google Patents

Abstract

A receiving device comprising circuitry configured to receive area mapping information including at least one target area identifier and location information associated with each target area identifier for each of the at least one target area identifier is provided. The circuitry is further configured to control filtering such that emergency information for a location associated with the receiving device is obtained based on the area mapping information.

Description

Receiving apparatus, receiving method, transmitting apparatus and transmitting method for location-based filtering of emergency information

The present technology relates to a receiving device, a receiving method, a transmitting device, and a transmitting method, and more particularly, to a receiving device capable of notifying useful emergency information, a receiving method, a transmitting device, and a transmitting method.

<Cross Reference to Related Applications>

This application claims the benefit of Japanese priority patent application JP 2015-076733 filed on April 3, 2015, the entire contents of which are incorporated herein by reference.

Currently, in the digital broadcasting standards of each country, as a transmission system, a Moving Picture Experts Group phase 2-Transport Stream (MPEG2-TS) system is adopted (see Non-Patent Document 1, for example). In the future, it is assumed that more advanced services will be provided by introducing an IP transmission system in which Internet Protocol (IP) packets used in the communication field are used for digital broadcasting.

For example, in Advanced Television Systems Committee (ATSC) 3.0, one of the next-generation digital broadcasting standards, IP packets including UDP/IP, that is, User Datagram Protocol (UDP) packets, rather than transport stream (TS) packets, perform data transmission. determined to be used for

ARIB STD-B10 Ed. 5.4, Association of Radio Industries and Businesses

On the other hand, it is requested to notify emergency information such as a weather alert as one request for digital broadcasting. However, when an IP transmission system is introduced as a transmission system for digital broadcasting, a technical system for notifying only useful emergency information among various types of emergency information has not been established.

It is desirable to be able to notify useful emergency information.

A receiving device according to an embodiment of the present technology is configured to receive region mapping information including at least one target region identifier and location information associated with each target region identifier for each of the at least one target region identifier. contains the circuit The circuitry is further configured to control filtering such that emergency information for a location associated with the receiving device is obtained based on the area mapping information.

A receiving device according to an embodiment of the present technology may be an independent device or an internal block constituting one device. A receiving method according to an embodiment of the present technology is a receiving method corresponding to the above-described receiving device according to an embodiment of the present technology. For example, a method of a receiving device for obtaining emergency information includes region mapping information including at least one target region identifier, and location information associated with each target region identifier for each of the at least one target region identifier. receiving by the circuitry of The method further includes controlling filtering by the circuitry such that emergency information for a location associated with the receiving device is obtained based on the area mapping information.

In a receiving apparatus and method according to an embodiment of the present technology, region mapping information including at least one target region identifier and location information associated with each target region identifier for each of the at least one target region identifier is received; , control of filtering such that emergency information for a location associated with the receiving device is acquired based on the area mapping information is executed.

A transmitting device according to another embodiment of the present technology includes circuitry configured to generate area mapping information including at least one target area identifier and, for each of the at least one target area identifier, location information associated with each target area identifier. do. Circuitry is configured to receive content and transmit content and area mapping information. Further, the circuitry is configured to transmit emergency information when an emergency occurs in an area represented by one of the at least one target area identifier.

A transmission device according to another embodiment of the present technology may be an independent device or an internal block constituting one device. A transmission method according to another embodiment of the present technology is a transmission method corresponding to the above-described transmission device according to another embodiment of the present technology. For example, a method of a transmitting device for transmitting emergency information includes region mapping information including at least one target region identifier, and location information associated with each target region identifier for each of the at least one target region identifier. It includes the step of generating by the circuit of. The method includes receiving content and transmitting by circuitry the content and area mapping information. The method further includes transmitting, by the circuitry, emergency information when an emergency situation occurs within an area represented by one of the at least one target area identifier.

In a transmitting apparatus and method according to another embodiment of the present technology, region mapping information including at least one target region identifier and location information associated with each target region identifier for each of the at least one target region identifier is generated; , content is received, and content and area mapping information are transmitted. Additionally, emergency information is transmitted when an emergency situation occurs in an area represented by one of the at least one target area identifier.

According to one and other embodiments of the present technology, useful emergency information may be notified.

The effects are not limited effects described herein, and may be any one of the effects described in the present disclosure.

1 is a diagram showing an example of the configuration of a transmission system.
Figure 2 is a diagram schematically showing the relationship and filtering between regions.
FIG. 3 is a diagram showing the relationship between areas to which area codes are assigned and areas represented by target area tags and geo-locations.
4 is a diagram illustrating an example of area mapping information.
5 is a diagram showing an example of an LLS packet.
6 is a diagram showing an example of an LLS header.
Fig. 7 is a diagram showing detailed contents of an LLS header.
8 is a diagram illustrating an example of type information.
9 is a diagram showing the structure of extended information of EAT.
10 is a diagram showing an operation example.
11 is a diagram showing an example of ADT syntax.
12 is a diagram showing an example of the syntax of EAT.
13 is a diagram showing an example of the configuration of a transmission device.
14 is a diagram showing an example of the configuration of the receiving device.
15 is a flow chart showing the transmission process.
16 is a flow chart showing an emergency information transmission process.
17 is a flow chart showing a receiving process.
18 is a flow chart illustrating an emergency information response process.
Fig. 19 is a diagram showing an example of a configuration of a computer.

Hereinafter, an embodiment of the present technology will be described with reference to the drawings. Descriptions will be presented in the following order.

1. System configuration

2. Overview of emergency information filtering function

3. Operation example

4. Syntax examples

5. Configuration of each device

6. Flow of processes executed by each device

7. Modification Example

8. Computer Configuration

<1. System configuration>

(Example of transmission system configuration)

A transmission system 1 shown in FIG. 1 is a system for providing digital broadcasting services. The transmission system 1 includes a transmission device 10; receiving device 20; and the server 30. In the configuration shown in FIG. 1 , the receiving device 20 and the server 30 are interconnected via the Internet 90 .

The transmitting device 10 is a transmitter conforming to a predetermined standard of digital broadcasting and is provided by a service provider (broadcaster). In an embodiment of the present technology, as a digital broadcasting standard, for example, a standard such as ATSC 3.0 or the like may be used.

The transmission device 10 transmits streams of components such as video, audio, and subtitles constituting content provided as a service through a transmission channel 80 using broadcast waves of digital broadcasting together with signaling data. Here, a service is, for example, a compilation of content (television programs) created by a service provider. Also, the signaling data is control information necessary for viewing content composed of components such as video and audio.

The receiving device 20 is a receiver conforming to a predetermined standard of digital broadcasting, such as ATSC 3.0, for example, and is a fixed receiver such as a television receiver, set-top box or recorder, or a smartphone, cellular phone, tablet computer, or notebook computer. or a mobile receiver such as a terminal used in a vehicle.

The receiving device 20 receives broadcast waves of digital broadcasting transmitted from the transmitting device 10 through the transmission channel 80, and acquires signaling data transmitted using the broadcast waves of digital broadcasting. The receiving device 20 connects to a stream of content (components constituting the content) transmitted using a broadcast wave of digital broadcast transmitted from the transmitting device 10 based on the signaling data, and the content acquired from the stream. Plays (outputs) the video and audio of

The server 30 executes streaming distribution of streams of components such as video, audio, and the like constituting content via the Internet 90 in response to a request from the receiving device 20 . In addition, the server 30 distributes signaling data (SLS signaling data to be described later) via the Internet 90 in response to a request from the receiving device 20 .

In addition to the signaling data, the server 30 distributes various data such as applications, web pages, or electronic service guides (ESGs) over the Internet 90, for example, in response to a request from the receiving device 20. can do.

The receiving device 20 has a communication function and can access the server 30 via the Internet 90 . The receiving device 20 distributes content (components constituting the content) from the server 30 via the Internet 90 in a streaming manner based on the signaling data transmitted from the transmitting device 10 or the server 30. Connects to the stream of, and reproduces (outputs) the video and audio of the content acquired from the stream.

In FIG. 1 , for convenience of explanation, only one receiving device is shown, but in reality, a plurality of receiving devices 20 are arranged and receive content that is simultaneously distributed from the transmitting device 10 in a broadcasting manner. As the transmission channel 80, in addition to terrestrial waves, a satellite link, a cable television network (wired), or the like can be used.

In the currently formulated ATSC 3.0, Link Layer Signaling (LLS) signaling data and Service Level Signaling (SLS) signaling data are defined as signaling data, and the SLS signaling data for each service is It is acquired based on the information described in the previously acquired LLS signaling data.

Here, LLS signaling data includes, for example, LLS meta data such as Fast Information Table (FIT), Emergency Alerting Table (EAT), Area Definition Table (ADT), and Region Rating Table (RRT). The FIT includes information indicating the configuration of a service or stream in a broadcasting network, such as information necessary for selecting a channel of a service (channel selection information). EAT includes information related to emergency alerts (emergency information). ADT includes area mapping information described later. RRT includes information related to ratings. In addition, LLS signaling data is transmitted in a layer lower than the IP layer of the ATSC 3.0 protocol stack.

SLS signaling data, for example SLS metadata such as User Service Description (USD), Media Presentation Description (MPD) and LCT Session Instance Description (LSID) is included USD includes information such as the acquisition destination of other meta data. MPD is control information used to manage reproduction of streams of components. The LSID is control information of a Real-time Object Delivery over Unidirectional Transport (ROUTE) protocol. In addition, ROUTE is a protocol that extends File Delivery over Unidirectional Transport (FLUTE), which is a protocol suitable for multicast transmission of binary files in one direction. SLS signaling data is transmitted in a layer higher than the IP layer of the protocol stack of ATSC 3.0.

<2. Overview of emergency information filtering function>

As one of the requests for digital broadcasting using an IP transmission system used in ATSC 3.0 or the like, notification of emergency information (emergency notification information) such as a wake-up alert is requested. Here, when various types of emergency information are notified using digital broadcasting using an IP transmission system, information valid only in a limited area within the range in which broadcast waves can be received from a broadcasting station (the transmission device 10) is considered to be included. Assume.

For example, since the content and target area of emergency information covers a wide range of areas from a weather warning for a rather wide area to commuter bus delay information for a specific narrow area, information useful for emergency information as well as a receiving device There is a possibility that unnecessary information about the user using (20) is also included. Further, when information up to information about a specific narrow area, such as delay information of commuting buses, is included in the emergency information, there is a possibility that the amount of information processed by the receiving device 20 side is very large.

In other words, since the information on the receiving position is limited, in order to display (present) useful information to the user and to reduce the process of the receiving device 20, the user using the receiving device 20 needs to It is effective to extract unnecessary information by filtering emergency information transmitted from (transmission device 10 of a broadcasting station) by area. Therefore, the present technology proposes an emergency information filtering function in units of regions.

(emergency information filtering function)

2 is a diagram illustrating an emergency information filtering function in units of regions according to an embodiment of the present technology.

In the case shown in Fig. 2, it is assumed that the broadcast wave transmitted from the transmitting device 10 of the broadcasting station can be received by the receiving device 20 arranged in the service area A1. Therefore, in case of an emergency, the transmitting device 10 of the broadcasting station can notify the plurality of receiving devices 20 arranged in the emergency information service area A1. In the example shown in Fig. 2, the transmission device 10 transmits a packet (LLS packet) including an EAT as a broadcast transmission packet.

Here, when the emergency information notified from the transmitting device 10 is valid information only in the area within the emergency alert (EA) target area A2, the emergency information is useful for the user using the receiving device 20 in the EA target area A2. Although information, emergency information is unnecessary information for a user using the receiving device 20 outside the EA target area A2.

In this case, by configuring the packet storing the EAT including the emergency information to include a code specifying the EA target area A2 (target area tag (target area code)), the receiving device 20 transmits EAT stored in the packet (emergency information contained therein ) has the EA target area A2 as its target.

That is, the receiving device 20 may perform packet-level filtering (hereinafter, also referred to as packet filtering) in units of regions, and may extract only useful emergency information by excluding unnecessary emergency information from the receiving site. In this way, only useful emergency information about the EA target area A2 is displayed (presented) to the user using the receiving device 20 inside the EA target area A2.

When the receiving device 20 is a fixed receiver such as a television receiver although its position is a receiving site of the receiving device 20, an area code or the like set by a user during initial scanning may be used. Meanwhile, when the receiving device 20 is a mobile receiver such as a smart phone, position information (geo-location information) represented by a received signal received from a positioning satellite such as a Global Positioning System (GPS) may be used.

In addition, although there are cases in which a plurality of messages are described as emergency information in EAT, message level filtering (hereinafter also referred to as message filtering) is added in area units (EA target detail areas), which are more detailed areas than EA target areas. By further excluding unnecessary emergency information at the receiving site by doing so, only more useful emergency information can be extracted.

For example, as shown in FIG. 2 , when emergency information messages M1 to Mn are described in EAT, the emergency information message M1 has an area other than the EA target detail area A3 inside the EA target area A2 as its target, , the emergency information message M2 will be considered to have the EA target detail area A3 inside the EA target area A2 as its target.

At this time, the receiving device 20 placed in the EA target detailed area A3 extracts only the emergency information message M2 by performing message filtering. Therefore, only useful emergency information about the EA target detailed area A3 is displayed (presented) to the user using the receiving device 20 within the EA target detailed area A3.

In addition, when the emergency information message M2 is displayed at a high priority level to the receiving device 20 disposed in the EA target detailed area A3, the emergency information message M1 is displayed at a lower priority level by using neighboring emergency information or the like. It can be configured so that On the other hand, in the receiving device 20 disposed in the area other than the EA target detailed area A3, the emergency information message M1 is displayed at a high priority level by performing message filtering.

As described above, according to the area-based emergency information filtering function according to an embodiment of the present technology, the user using the receiving device 20 performs two-step emergency information filtering according to packet filtering and message filtering. is only notified of useful information at the receiving site.

As described above, as the receiving site (location information) of the receiving device 20, various formats such as, for example, an area code set by a user, position information indicated by a received signal transmitted from GPS (geo-location information), etc. may be considered for use. Here, in order to perform filtering on an area-by-area basis, it is necessary that a target area tag associated with emergency information and location information such as an area code or geo-location information have a common ID system.

(Mapping between area code and geo-location information for each EA target area)

3 shows area codes allocated to counties in Indiana, USA as an example of allocating codes to respective areas. The area code assigned to each county is defined as the county code in the Federal Information Processing Standards (FIPS) of the US federal government.

As shown in FIG. 3, a broadcasting station (a transmitting device 10 of the broadcasting station) is disposed in the center of the service area A11, and a plurality of receiving devices 20 arranged in the service area A11 transmit data transmitted from the transmitting device 10. broadcast waves can be received.

Here, when focusing on some areas of the state of Indiana, for each area that is a target of emergency information, each county may be divided into five areas of EA target areas A21 to A25. Each of the EA target areas A21 to A25 is constituted by one or a plurality of counties (EA target detailed areas). Also, EA target areas A21 to A25 are associated with geo-locations G21 to G25, respectively, represented by rectangles formed by northwest points (ax, ay) and southeast points (bx, by), respectively.

Expressing the relationship between EA target areas (target area tags), EA target detailed areas (area codes) and geo-location information more concretely, the relationship is expressed as shown in FIG. 4, for example.

That is, the EA target area A21 denoted by a target area tag of "0x0001" is White County with area code "18181", Carroll County with area code "18015", Tippe Canoe County with area code "18157" and area code "18023". of Clinton County. Also, the EA target area A21 represented by “1” in FIG. 3 is a geo-location specified by the longitude and latitude of the northwest point represented by (a1x, a1y) and the southeast point represented by (b1x, b1y) Associated with G21.

The EA target area A22, represented by a target area tag of "0x0002", is Montgomery County with area code "18107", Boone County with area code "18011", Putnam County with area code "18133", and Hendricks with area code "18063". county, Marion County with area code "18097", Owen County with area code "18119", Monroe County with area code "18105", Brown County with area code "18013", Johnson County with area code "18081" and area code " 18109" is formed by Morgan County.

EA target area A22, represented by “2” in FIG. 3, is the geo-location G22 specified by the longitude and latitude of the northwest point represented by (a2x, a2y) and the southeast point represented by (b2x, b2y). related

The EA target area A23, represented by a target area tag of "0x0003", is Fulton County with area code "18049", Cass County with area code "18017", Miami County with area code "18103", and Wabash with area code "18169". County, Howard County with area code "18067", Grant County with area code "18053", Huntington County with area code "18069", Blackford County with area code "18009", and Delaware County with area code "18035" .

EA target area A23 represented by “3” in FIG. 3 is geo-location G23 specified by the longitude and latitude of the northwest point represented by (a3x, a3y) and the southeast point represented by (b3x, b3y) related

The EA target area A24, represented by a target area tag of "0x0004", is Tipton County with area code "18159", Hamilton County with area code "18057", Madison County with area code "18095", and Henry with area code "18065". County, Jay County with area code "18075", Randolph County with area code "18135", Wayne County with area code "18177", Fayette County with area code "18041", Rush County with area code "18139", Area Code " 18059", Shelby County at area code "18145", Bartholomew County at area code "18005", and Decatur County at area code "18031".

EA target area A24, represented by “4” in FIG. 3, is the geo-location G24 specified by the longitude and latitude of the northwest point represented by (a4x, a4y) and the southeast point represented by (b4x, b4y). related

The EA target area A25 represented by a target area tag of "0x0005" is constituted by Morgan County with area code "18109". EA target area A25, represented by “5” in FIG. 3, is the geo-location G25 specified by the longitude and latitude of the northwest point represented by (a5x, a5y) and the southeast point represented by (b5x, b5y). related

As described above, by defining area mapping information mapping an area code and geo-location information for each target area tag, a target area tag associated with emergency information and location information such as an area code or geo-location information can be related to each other. Accordingly, the receiving device 20 may perform emergency information filtering in units of regions such as packet filtering or message filtering by using the region mapping information.

For example, as the receiving site (location information) of the receiving device 20, an area code set by the user or position information indicated by a received signal received from GPS (geo-location information) is obtained. Accordingly, the receiving device 20 converts the area code or geo-location information into a target area tag by using the area mapping information. Therefore, even when the packet storing the EAT including the emergency information includes a target area tag designating the EA target area, the receiving device 20 can convert the area code or geo-location information to obtain the target area Emergency information filtering such as packet filtering can be performed using tags.

That is, in the receiving device 20, various formats such as area code and geo-location information are considered to be used as a receiving site (location information), but by defining area mapping information, emergency information filtering is performed based on area code and geo-location information. It can be done for both geo-location information.

For example, area codes are defined as county codes in the Federal Information Processing Standards (FIPS). Therefore, the case where the EA target area identified by the target area tag—for which the service provider side notifies emergency information—is different from the county (eg, EA target detailed area) identified by the area code can be considered. More specifically, the EA Target Area A21 comprised of White County ("18181"), Carroll County ("18015"), Tippe Canoe County ("18157"), and Clinton County ("18023") is notified of emergency information. In this case, the notification area is not one county (the EA target detail area) and therefore cannot be represented using area codes (county codes in FIPS).

In this case, the transmitting device 10 provided by the service provider notifies the receiving device 20 of area mapping information (FIG. 4), and then sends a packet storing an EAT including emergency information to the EA in case of an emergency. It is configured to include a target area tag (“0x0001”) designating the target area A21, and the receiving device 20 disposed inside the EA target area A21 executes emergency information filtering by area and notifies the user of useful emergency information can do.

In this way, by supplying the area mapping information defined by the service provider to the receiving device 20 side before the emergency information notified in the case of an emergency, the service provider can freely set the EA target area to which emergency information is notified and the federal More flexible operation can be performed without being bound by various laws of county codes such as information processing standards (FIPS). That is, area mapping information can be regarded as information that correlates emergency information and information related to areas.

The area mapping information shown in FIG. 4 is an example, and if a format other than area code and geo-location information is used as the receiving site (location information) of the receiving device 20, area mapping information suitable for the other format may be used. can In the area mapping information shown in FIG. 4, the target area tag is associated with both area code and geo-location information, but at least one of the area code and geo-location information may be associated with the target area tag.

In the case shown in FIG. 3, it is desirable that the zones represented by the EA target areas A21 to A25 and the zones represented by the geo-locations G21 to G25 coincide with each other, but in practice, such zones coincide with each other. If it is difficult to configure to do so, some deviation may be allowed.

(Structure of LLS Packet)

5 shows a configuration of an IP packet or a BBP packet storing LLS signaling data.

A BBP packet is composed of a BBP header and payload. When ATCS 3.0 (IP Transmission System) is used, IP packets and LLS signaling data are arranged in the payload of BBP packets. The BBP header includes type information, and based on the type information, it can be determined whether the BBP packet is an IP packet or LLS signaling data.

When the LLS signaling data is arranged in the payload of the BBP packet, the LLS packet constituted by the LLS header and the payload is arranged in this payload. In this LLS packet, LLS signaling data is arranged in the payload, and at least LLS index information (signaling index) is arranged in the LLS header.

(Structure of LLS Header)

6 is a diagram showing the structure of the LLS header (its LLS index information). In FIGS. 7 to 9, each element constituting the LLS header shown in FIG. 6 is described, and the description will be presented with appropriate reference to the drawings.

In the structure shown in Fig. 6, "CO", "Type", "Type extension" and "Version" are arranged in an LLS header having 32 bits.

"CO" of 2 bits from the most significant bit (MSB) is an abbreviation of "Compress", and is information indicating compression/no compression of target LLS signaling data (compression information). For example, as shown in Fig. 7, when there is no compression, "0" is set for "CO". On the other hand, when the LLS signaling data (the file) is compressed according to zip, "1" is set for it. Also, when LLS signaling data (its file) is compressed according to bim (binary format of MPEG-7 data), "2" is set for it. Also, "3" is reserved for future expansion.

Referring back to FIG. 6 , “type” in which 6 bits are arranged after “CO” is information indicating the type of LLS signaling data (type information). For example, in this type information, as shown in Fig. 8, when all LLS meta data (LLS packages) are arranged, "0x00" is set as "type". Similarly, for "Type", a value corresponding to the type of LLS signaling data placed in the payload of the LLS packet is set. Therefore, "0x01" is set when FIT is arranged, "0x02" is set when RRT is arranged, "0x03" is set when EAT is arranged, and "0x04" is set when ADT is arranged. is set

Referring again to FIG. 6, "type extension" having 16 bits arranged after "type" is an extended filtering parameter (extension information) set for each type of LLS signaling data. For this extension information, arbitrary information corresponding to the type information can be set.

More specifically, for example, as shown in FIG. 9, when type = "0x03", that is, when EAT is set as type information, the target area tag (Area_tag) is a type formed by 16 bits It is assigned to the upper 8 bits of the extension, and the provider ID (Provider_id) is assigned to the remaining 8 bits. Here, as the target area tag, a target area tag corresponding to the EA target area A2, for example, "0x0001" or "0x0002" is set.

Also, as a target region tag in the extended information, a specific bit array may be assigned to a specific function. For example, when "0x00" is set as the target area tag, it indicates that the entire specific area such as service area A1 is a target for notification of emergency information, and when "0xFF" is set, it indicates that the service area A1 etc. Indicates that an area other than a specific area of is the target of emergency information. For example, by configuring “0xFF” to be settable as a target area tag, it allows a user using the receiving device 20 within the service area A1 to check emergency information notified in an area other than the service area A1. can be operated.

In addition, by configuring a service provider ID assignable to the extended information, the receiving device 20 can extract only emergency information notified from a specific service provider. For example, instead of a service provider ID, an 8-bit priority level may be assigned. For example, by setting four priority levels of "0" to "3" as priority levels, the receiving device 20 can extract only emergency information having a higher priority level. In this example, it is described that the higher the value of the priority level, the higher the priority level.

In this way, the EAT contains emergency information, but emergency information may not be determined to be useful information for all users depending on its target and service provider's area, degree of emergency, etc. Therefore, by setting the filtering conditions to be extended using the extension information, the receiving device 20 can extract only useful information.

Referring back to FIG. 6, "version", which is 8 bits from the least significant bit (LSB) arranged next to "type extension", is information (version information) indicating the version of the LLS signaling data.

As LLS index information, it is not necessary to arrange all compression information (CO), type information (Type), extension information (Type extension) and version information (Version), but at least one type of information (e.g. , type information and extension information) may be arranged according to filtering conditions. Here, compression information (CO), type information (Type), extension information (Type extension) and version information (Version) are examples of LLS index information, and as long as the parameter can be used in the filtering process of LLS signaling data, any Other parameters may be defined.

As described above, the LLS header defines LLS index information composed of compression information (CO), type information (Type), extension information (Type extension), and version information (Version). Therefore, the receiving device 20 can obtain the LLS signaling data by performing the LLS packet filtering process using the LLS index information in the LLS header.

<3. Action example>

(Emergency information message transmission in startup state)

Next, a specific operation example will be described with reference to FIG. 10 . 10 is a diagram showing transmission of an emergency information message when the receiving device 20 is activated.

In Fig. 10, the upper side shows the flow of data transmitted (sent) from the transmitting device 10, and the lower side shows the flow of the process executed by the receiving device 20 that processes the data. In Fig. 10, it is assumed that the direction of time is from left to right.

In the flow shown in Fig. 10, the transmission device 10 installed in the broadcasting station transmits broadcast waves (broadcast stream) of digital broadcasting using the IP transmission system. In this broadcast wave, components and streams of SLS, NTP streams, and LLS streams constituting one or a plurality of services (SC: Service Channels) for each PLP (Physical Layer Pipe) are transmitted. In the preamble, control information defined in the physical layer is transmitted.

As shown in Fig. 10, the receiving device 20 acquires the ADT transmitted in the LLS stream through an initial scanning process or the like, and the area mapping information included in the ADT is recorded in a memory such as non-volatile RAM (NVRAM). (S11 and S12).

In addition, in the receiving device 20, the channel selection information obtained from the FIT is recorded in the memory at the time of executing the initial scanning process, and thus, when the channel selection operation of the service by the user is executed, the channel selection process of the service in which the channel is selected is executed, and the video of the television program is displayed (S13, S14 and D11).

Here, the receiving device 20 displaying the television program performs packet filtering by constantly monitoring the packets (LLS packets) storing the EAT transmitted in the LLS stream, and for the EA target area A2 including the receiving site When the targeted EAT is detected, the EAT is acquired (S15 and S16).

In this packet filtering, the LLS header of the LLS packet is monitored, and the type information (type) indicates EAT and the receiving site is included in the EA target area represented by the target area tag (Area_tag) arranged in the extension information (type extension). In this case, the EAT arranged in the payload of the LLS packet is acquired.

However, in the receiving device 20, since the receiving site is an area code set by the user, position information (geo-location information) expressed by a received signal received from GPS, and the like, a target area tag arranged in the LLS header and It is difficult to perform direct matching between receiving sites. Accordingly, the receiving device 20 converts the area code or geo-location information to the target area tag by using the area mapping information recorded in the memory in the process of step S12 to become an ID system common to the conversion target area tags arranged in the LLS header. and then matching the converted target area tag with the target area tag arranged in the LLS header.

Here, filtering for each service provider or filtering according to the priority level may be executed together, for example, by using the service provider ID or priority level arranged in the extended information of the LLS header.

As shown in Fig. 10, since an EAMessageData element among elements of EAMessage appears in the EAT obtained in the process of step S16, emergency information is transmitted in the form of a subtitle as an emergency information message. Accordingly, the receiving device 20 displays the message content of the EAMessage element of the EAT ("There is an alert for heavy rain..." included in the EAT shown in the figure) to overlap with the displayed television program (S17 and D12) . Accordingly, the user can know that a warning about heavy rain has been issued by checking the subtitle (of the emergency information message) displayed to overlap with the television program.

However, since the target detailed area code is set in the EAGeoloc element of the EAT, the receiving device 20 performs matching on whether or not the receiving site is included in the EA target detailed area A3 represented by the target detailed area code of the EAT. By doing so, message filtering is performed. Then, as a result of this message filtering, if an emergency information message targeted for the EA target detailed area A3 containing the receiving site is detected, the emergency information message is displayed. In the example shown in FIG. 10, a case where an emergency information message targeted for the EA target detailed area A3 including the receiving site is detected is shown (D12).

In the EAT shown in Fig. 10, one emergency information message is described, but similar message filtering is performed even if a plurality of emergency information messages are described, one or more targeted for the EA target detail area A3 containing the receiving site. If multiple emergency information messages are detected, one or more emergency information messages are displayed. If there are a plurality of emergency information messages, the user can select a desired emergency information message.

Here, the content of subtitles displayed to overlap with the television program indicates the issuance of a warning for heavy rain, but does not indicate its detailed information. For this reason, when the display of detailed information is instructed according to a user's operation such as a remote controller (S18), detailed information of the heavy rain alert is displayed as additional information of the emergency information (S19 to S22).

More specifically, in the EAT shown in FIG. 10, the EAService element among the elements of EAMessage appears, "nrt" is specified as the serviceType attribute, and therefore, the detailed information of the alert for heavy rain is Non Real Time (NRT ) It is transmitted as NRT portal information of portal service. Accordingly, by executing the channel selection process by using the serviceId attribute value of the EAService element of the EAT and the channel selection information (SLS bootstrap information), the receiving device 20 receives the SLS signaling data transmitted through the ROUTE session Acquired (S19).

Thereafter, the receiving device 20 acquires NRT portal information transmitted using the ROUTE session according to the SLS signaling data (S20), and displays detailed information of the heavy rain alert obtained therefrom (S21, S22 and D13). ).

As described above, in the emergency information message transmission shown in Fig. 10, when the receiving device 20 while displaying a television program executes packet filtering and an EAT for the EA target area A2 including the receiving site is detected, The EAT is obtained and message filtering is further executed, and when an emergency information message for the EA target detailed area A3 including the receiving site is detected, the emergency information message is displayed.

Accordingly, the reception device 20 transitions from the screen on which the television program is displayed (state D11) to the screen on which the caption (emergency information message) overlaps with the television program (state D12), whereby the caption of emergency information is displayed on the screen. displayed on As a result, the user watching the television program can know that a warning about heavy rain has been issued by forcibly checking the subtitle displayed to overlap with the television program.

Further, the user who has checked the subtitles overlapping with the television program, when desiring to acquire more detailed weather-related information, executes a predetermined operation, whereby the detailed information of the warning about heavy rain transmitted as NRT portal information. The screen of (D13 state) is displayed on the receiving device 20. As a result, the user can acquire deeper information about the warning for heavy rain by checking detailed information including information that cannot be expressed in subtitles.

In the operation example shown in FIG. 10, detailed information of emergency information has been described as being transmitted using a ROUTE session as NRT portable information, but other transmission methods through broadcasting or communication may be used.

For example, the server 30 connected to the Internet 90 may provide an application used for emergency information (emergency information application) as detailed information of emergency information. In this case, when displaying the detailed information is instructed by the user, the receiving device 20 accesses the server 30 via the Internet 90 and obtains and launches the emergency information application, thereby detailed information of the emergency information. presents The emergency information application may be controlled using application control information such as an Application Information Table (AIT).

In addition, the server 30 connected to the Internet 90 may provide a web page composed of HTML (HyperText Markup Language) format documents as detailed emergency information. In this case, when the display of the detailed information is instructed by the user, the receiving device 20 accesses the server 30 via the Internet 90 and obtains and displays a web page, thereby displaying the detailed information of the emergency information. present. Also, in the example shown in FIG. 10 , instead of an emergency information message, another form of emergency information such as an emergency information application or web page may be transmitted.

In the operation example shown in FIG. 10, an example in which, when the receiving device 20 is started up and displays a television program, an EAT containing emergency information is detected and an emergency information message is displayed, but it is 20) may be configured to be in a sleep state, after the receiving device 20 is forcibly started, EAT including emergency information is detected, and an emergency information message is displayed. In this case, by including the signal (forced emergency start signal) used to urgently activate the receiving device 20 as control information in the preamble in a forcible manner, the transmitting device 10 forcibly causes the receiving device ( The receiving device 20 can be activated urgently by turning on the power of 20).

<4. Examples of Syntax>

(Syntax of ADT)

11 is a diagram showing an example of the syntax of an ADT in XML (Extensible Markup Language) format. In Fig. 11, "@" is attached to each attribute between elements and attributes. Also, indented elements or attributes are specified for higher rank elements. This relationship is similar to the syntax of EAT shown in FIG. 12 described later.

As shown in FIG. 11, an adt element as a root element is an element of a higher rank than an area element.

Information about the EA target area is specified in the area element. The area element is a higher rank element of the areaTag attribute, codes element, and geo_loc element. The target area tag is specified in the areaTag attribute.

Also, information about area codes is specified in the codes element. The codes element is a higher rank element of the type attribute and unit element. Information indicating the type of area code (type information) is specified in the type attribute. For example, as type attributes, "fipsc", "fipss", "zip5" or "zip9" are set.

"fipsc" and "fipss" represent the County Code (C) and State Code (S) of the Federal Information Processing Standards (FIPS). Also, "zip5" and "zip9" represent a 5-digit zip code and a 9-digit zip code used by the United States Postal Service (USPS). The value of the area code is specified in the unit element.

Information about the geo-location is specified in the geo_loc element. The geo_loc element is an element of a higher rank of the nw_lat attribute, the nw_lon attribute, the se_lat attribute, and the se_lon attribute. The nw_lat attribute indicates the latitude of the northwest end. The nw_lon attribute represents the longitude of the northwest end. The se_lat attribute indicates the latitude of the southeast end. The se_lon attribute indicates the longitude of the southeast end.

In Fig. 11, when "1" is specified as the frequency of appearance (cardinality), only one of the elements or attributes is necessarily specified, and when "0..1" is specified, whether an element or an attribute is specified. whether or not is arbitrary. Further, when "1..n" is specified, one or more elements or attributes are specified, and when "0..n" is specified, whether one or more elements or one or more attributes are specified is arbitrary. am. This relationship is similar to the syntax of EAT shown in FIG. 12 to be described later.

(Syntax of EAT)

Fig. 12 is a diagram showing an example of the syntax of EAT in XML format.

As shown in FIG. 12, an Eat element as a root element is an element of a higher rank than an AutomaticTuningService element and an EAMessage element.

In the AutomaticTuningService element, information about a service (automatic channel selection service) for which a channel is selected at startup when the reception device 20 is forcibly started is designated. The AutomaticTuningService element is a higher rank element of broadcastStreamID and serviceId attributes. In the broadcastStreamID attribute, the broadcast stream ID of the automatic channel selection service is designated. In the serviceId attribute, the service ID of the automatic channel selection service is specified.

In the EAMessage element, a message of emergency information is specified. The EAMessage element is a higher rank element among eaMessageId attribute, eaPriority attribute, EAGeoloc element, EAMessageData element, EAApplication element, EAService element, EAWww element, and EA_phonetic_info element.

In the eaMessageId attribute, the message ID is designated as an identifier of emergency information. In the eaPriority attribute, the priority level of emergency information is specified.

In the EAGeoloc element, information about the EA target detail area is specified. The EAGeoloc element is a higher rank element of the type attribute. In the type attribute, information indicating the type of the EA target detailed area code (type information) is specified. As the type attribute, "adt", "fips5", "zip5" or "zip9" is set.

"adt" indicates that the target area tag is set as the EA target detail area code. For example, if "adt" is set, the target area tag is used for both packet filtering and message filtering. More specifically, by applying this to the examples shown in Figs. 3 and 4 described above, this means that after packet filtering is executed by using a target region tag of "0x0002", a target region tag of "0x0005" Use to respond to cases where message filtering is executed. That is, for example, Morgan County having an area code of "18109" is an area of EA target area A22 belonging to EA target area A25, and this target area tag is specified in an embedded manner, and thus such emergency information filtering is executed. can

"fips5" represents a Federal Information Processing Standards (FIPS) code with 5 digits, i.e., a county code composed by 5 digits. Also, "zip5" and "zip9" represent a 5-digit zip code and a 9-digit zip code used by the United States Postal Service (USPS).

The value of the EA target detailed area code corresponding to this type information is designated as the value of the EAGeoloc element. Although the EAGeoloc element may not be specified, however, in this case, filtering of type information corresponding to packet filtering in message filtering is performed. For example, if packet filtering using target area tags is performed, filtering using target area tags is also performed in message filtering. By specifying a plurality of EAGeoloc elements, logical operations such as logical AND and logical OR corresponding to a plurality of EA target detailed area codes are applied, and more complex filtering conditions can be set.

When emergency information is transmitted as a caption, the caption information (emergency information message) is specified in the EAMessageData element.

When emergency information is transmitted as an emergency information application, information about the emergency information application is specified in the EAApplication element. The EAApplication element is a higher rank element of the applicationId attribute. In the applicationId attribute, the application ID of the emergency information application is specified. Also, this application ID is associated with an identifier of an application managed in application control information such as AIT.

When emergency information is transmitted as an emergency information service, information about the emergency information service is specified in the EAService element. The EAService element is a higher rank element than serviceId and serviceType attributes. The service ID of the emergency information service is specified in the serviceId attribute. In the serviceType attribute, service type information is specified. As this service type information, "nrt", "tv" or "audio" is designated.

"nrt" indicates that emergency information is transmitted as NRT portal information of the NRT portal service. "tv" indicates a transition to a dedicated channel (service) providing emergency information. "audio" indicates that emergency information is provided using audio data. In this case, the video of the television program being viewed remains the same, and only the audio is replaced by the audio of the emergency information.

If emergency information is provided by an emergency information site on the Internet 90, information about the emergency information site is specified in the EAWww element. The EAWww element is a higher rank element of the url attribute. The URL (Uniform Resource Locator) of the emergency information site is specified in the url attribute. For example, as this URL, the URL of the server 30 providing the emergency information site can be designated.

In the EA_phonetic_info element, information about voice reading used exclusively for the visually impaired is specified. The EA_phonetic_info element is a higher rank element of the format attribute and the url attribute. In the format attribute, the format of text information that can be read using a voice reading engine is specified. For example, "ssml" is specified as this format. "ssml" denotes Speech Synthesis Markup Language (SSML), which is a speech synthesis markup language.

Further, in the url attribute, the URL of the acquisition destination of text information used for voice reading is specified. For example, as this URL, the URL of the server 30 that provides text information used for voice reading can be designated. Also, text information used for voice reading may be specified as a value of an EA_phonetic_info element instead of being obtained from the server 30 on the Internet 90.

Also, the syntaxes of ADT shown in FIG. 11 and EAT shown in FIG. 12 are examples, and other syntaxes may be used. Also, ADT and EAT are not limited to XML format and can be described using other markup languages or can be in section format.

<5. Configuration of each device>

Next, detailed configurations of the transmission device 10 and the reception device 20 constituting the transmission system 1 shown in FIG. 1 will be described. Here, the detailed configuration of the server 30 will not be described, but the server 30 has the function of a general server.

(Configuration of transmission device)

FIG. 13 is a diagram showing an example of the configuration of the transmission device 10 shown in FIG. 1 .

As shown in Fig. 13, the transmission device 10 includes a component acquiring unit 111; encoder 112; signaling generating unit 113; signaling processing unit 114; area mapping information generating unit 115; emergency information generating unit 116; multiplexer 117; and a transmission unit 118.

The component acquisition unit 111 acquires data of video, audio, subtitles, etc. (components thereof) constituting content (e.g., a television program) provided by a specific service, and converts the obtained data to the encoder 112. supply to The encoder 112 codes data of video, audio, etc. (its components) supplied from the component acquisition unit 111 according to a predetermined coding system, and supplies the coded data to the multiplexer 117.

Further, for example, the component acquisition unit 111 acquires content corresponding to a broadcast time frame from a repository of already recorded content, or acquires live content from a studio or location venue.

The signaling generating unit 113 acquires original data used to generate signaling data from an external server, built-in storage, or the like. The signaling generating unit 113 generates signaling data by using original data of the signaling data and supplies the generated signaling data to the signaling processing unit 114. The signaling processing unit 114 processes the signaling data supplied from the signaling generating unit 113 and supplies the processed signaling data to the multiplexer 117 .

Here, LLS signaling data composed of LLS metadata such as FIT and SLS signaling data composed of SLS metadata such as USD and MPD are generated and processed.

Area mapping information generating unit 115 acquires original data used to generate area mapping information from an external server, built-in storage, or the like. The area mapping information generating unit 115 generates area mapping information by using original data of the area mapping information and supplies the generated area mapping information to the signaling processing unit 114 . The signaling processing unit 114 generates an ADT including the area mapping information by synthesizing the ADT supplied from the signaling generating unit 113 and the area mapping information supplied from the area mapping information generating unit 115, and the generated ADT is supplied to the multiplexer 117.

Area mapping information may be included in other LLS metadata such as FIT and EAT instead of being included in ADT. However, when region mapping information is included in FIT, for example, region mapping information may be described as an independent element of FIT. Meanwhile, when region mapping information is included in the EAT, there is no need to update the region mapping information unless its content is changed, and accordingly, there is no need to configure the region mapping information to be included in all EATs.

The emergency information generation unit 116 acquires original data of emergency information such as CAP (Common Alerting Protocol) information from an external server or the like. The emergency information generation unit 116 generates emergency information by using original data of emergency information such as CAP information and the like, and supplies the generated emergency information to the signaling processing unit 114. The signaling processing unit 114 generates an EAT including emergency information by synthesizing the EAT supplied from the signaling generating unit 113 and the emergency information supplied from the emergency information generating unit 116, and generates the generated EAT by a multiplexer supply to (117).

CAP information is an emergency information message described in an XML format used in an emergency notification system called EAS (Emergency Alerting System) maintained in the United States. By using this CAP information, various levels of emergency information can be notified through various media, from high priority items from the President to local notice items. Here, CAP information is an example of an emergency information message, and for example, an emergency alert message obtained from another organization, service provider, etc., such as information about a weather alert provided by an organization issuing a weather alert, may be used.

The multiplexer 117 generates a BBP stream by multiplexing the data of the components supplied from the encoder 112 and the signaling data supplied from the signaling processing unit 114, and supplies the generated BBP stream to the transmission unit 118. do. The transmission unit 118 transmits the BBP stream supplied from the multiplexer 117 through the antenna 131 as a broadcast wave (digital broadcast signal) of digital broadcasting using an IP transmission system.

(configuration of the receiving device)

FIG. 14 is a diagram showing an example of the configuration of the receiving device 20 shown in FIG. 1 .

As shown in Fig. 14, the receiving device 20 includes a tuner 211; demultiplexer 212; signaling processing unit 213; control unit 214; input unit 215; memory 216; decoder 217; display unit 218; speaker 219; emergency information processing unit 220; and a communication unit 221.

The tuner 211 extracts a digital broadcasting signal according to the user's service channel selection operation from the digital broadcasting broadcast wave (digital broadcasting signal) using the IP transmission system received through the antenna 231, and extracts the extracted digital broadcasting signal. is demodulated, and the resulting BBP stream is supplied to the demultiplexer 212.

The demultiplexer 212 divides the BBP stream supplied from the tuner 211 into data, such as video, audio, and subtitles, and signaling data as components. The demultiplexer 212 supplies data such as video and audio to the decoder 217 and supplies signaling data to the signaling processing unit 213.

In addition, when EAT including emergency information is extracted from the BBP stream, the demultiplexer 212 supplies the EAT to the emergency information processing unit 220 .

The signaling processing unit 213 processes the signaling data supplied from the demultiplexer 212 and supplies the processed signaling data to the control unit 214 . Here, LLS metadata such as FIT as LLS signaling data and SLS metadata such as USD and MPD as SLS signaling data are acquired and processed.

The control unit 214 controls the operation of each unit of the receiving device 20. The control unit 214 controls the operation of each unit so that a stream of components delivered through broadcasting or communication is acquired and reproduced based on the signaling data supplied from the signaling processing unit 213.

The input unit 215 supplies an operation signal according to a user's operation to the control unit 214 . The control unit 214 controls the operation of each unit based on the operation signal supplied from the input unit 215. The memory 216 is a non-volatile memory such as NVRAM, and records various data under the control of the control unit 214 .

The decoder 217 decodes data of video, audio, etc. (its components) supplied from the demultiplexer 212 according to a predetermined decoding system, and transmits the video data and audio data to the display unit 218 and speaker 219. supply each. The display unit 218 displays video corresponding to the video data supplied from the decoder 217. The speaker 219 outputs audio corresponding to the audio data supplied from the decoder 217.

The emergency information processing unit 220 processes the EAT including the emergency information supplied from the demultiplexer 212 and supplies subtitles or detailed information of the emergency information to the display unit 218 based on the result of the process. The display unit 218 displays subtitles or detailed information of emergency information supplied from the emergency information processing unit 220 . Also, the emergency information processing unit 220 supplies audio data of the emergency information to the speaker 219 . The speaker 219 outputs audio corresponding to the audio data of the emergency information supplied from the emergency information processing unit 220.

The communication unit 221 may access the server 30 via the Internet 90 under the control of the control unit 214 and request detailed information of the emergency information. The communication unit 221 receives detailed information of emergency information transmitted from the server 30 through the Internet 90 and supplies the received detailed information to the emergency information processing unit 220 . The emergency information processing unit 220 supplies detailed information of the emergency information transmitted through communication to the display unit 218 to be displayed on the display unit 218 .

Further, the communication unit 221 accesses the server 30 via the Internet 90 and requests delivery of a stream of components such as video, audio, etc. under the control of the control unit 214 . The communication unit 221 receives a stream of components delivered in a streaming manner from the server 30 via the Internet 90 and supplies the received stream to the decoder 217 . In addition, the communication unit 221 accesses the server 30 via the Internet 90, receives signaling data (eg, SLS meta data), and sends the received signaling data under the control of the control unit 214. supplied to the control unit 214.

In FIG. 14, a configuration including a display unit 218 and a speaker 219 is shown when the receiving device 20 is a television receiver, a mobile receiver, or the like, but, for example, the receiving device 20 is a set-top box or a recorder In the case of the like, the display unit 218 and the speaker 219 may be configured to be disposed outside. Also, the receiving device 20 may be configured not to have a communication function such as the communication unit 221 .

Although not shown in the configuration shown in FIG. 14, when the receiving device 20 is a mobile receiver, for example, a function for receiving a received signal received from a positioning satellite such as a GPS or the like, a function for obtaining reception site information. this is arranged

<6. Process flow executed by each device>

Next, the flow of the process executed by each device constituting the transmission system 1 shown in FIG. 1 will be explained with reference to the flow charts shown in FIGS. 15 and 18 .

(sending process)

First, a transmission process executed by the transmission device 10 shown in FIG. 1 will be described with reference to a flowchart shown in FIG. 15 .

In step S111, the component acquiring unit 111 acquires data of video, audio, etc. (the components). Further, in step S111, the encoder 112 codes the data of video, audio, etc. (the components) acquired by the component acquiring unit 111.

In step S112, the signaling generating unit 113 generates signaling data by using original data of the signaling data. Also, in step S112, the signaling processing unit 114 processes the signaling data generated in the signaling generating unit 113.

In step S113, the multiplexer 117 generates a BBP stream by multiplexing the data of the components coded in the process of step S111 and the signaling data processed in the process of step S112.

In step S114, the transmission unit 118 transmits the BBP stream generated in the process of step S113 through the antenna 131 as a broadcast wave (digital broadcast signal) of digital broadcasting by using the IP transmission system. When the process of step S114 ends, the transmission process shown in Fig. 15 ends.

As above, the transmission process has been described.

(Emergency information transmission process)

Next, an emergency information transmission process executed by the transmission device 10 shown in FIG. 1 will be described with reference to a flowchart shown in FIG. 16 .

In step S131, the area mapping information generating unit 115 generates area mapping information by using original data of the area mapping information. The area mapping information generated by the area mapping information generating unit 115 is included in the ADT and multiplexed with data of components and the like. Area mapping information may be included in other LLS metadata such as FIT and EAT instead of being included in ADT.

In step S132, the transmitting unit 118 transmits the BBP stream including the ADT (area mapping information) through the antenna 131 as a broadcast wave (digital broadcast signal) of digital broadcasting by using the IP transmission system.

In step S133, it is determined whether or not emergency information is transmitted. In step S133, if it is determined that emergency information is not transmitted, the process returns to step S131, and the process of steps S131 to S133 is repeated. On the other hand, if it is determined that CAP information is provided from, for example, an external server or the like, and emergency information is transmitted, the process proceeds to step S133.

In step S134, the emergency information generating unit 116 generates emergency information based on original data of emergency information such as CAP information acquired from an external server or the like. The emergency information generated by the emergency information generating unit 116 is included in the EAT and multiplexed with data of components and the like.

In step S135, the transmission unit 118 transmits the BBP stream containing the EAT (emergency information) through the antenna 131 as a broadcast wave (digital broadcast signal) of digital broadcasting by using the IP transmission system. When the process of step S135 ends, the emergency information transmission process shown in Fig. 16 ends.

As above, the emergency information transmission process has been described. In this emergency information transmission process, the area mapping information is transmitted before the emergency information, and the emergency information is transmitted in case of an emergency situation. Accordingly, in the case of an emergency, the receiving device 20 performs filtering in units of regions by using the region mapping information obtained in advance, and thus acquires only emergency information suitable for the receiving site among emergency information notified to each region. do. As a result, useful information can be presented (notified) to the user using the receiving device 20 .

(receiving process)

Next, a receiving process executed by the receiving device 20 shown in FIG. 1 will be described with reference to a flowchart shown in FIG. 17 . For example, the receiving process shown in FIG. 17 is executed when a desired service is selected by a user's operation, for example. It is also assumed that in the memory 216, channel selection information acquired from the FIT through an initial scanning process or the like is recorded.

In step S211, the tuner 211 receives broadcast waves (digital broadcast signals) of digital broadcasting using the IP transmission system received through the antenna 231. The BBP stream obtained by the demodulation process executed by the tuner 211 is divided into data such as video, audio, and subtitles as components and signaling data.

In step S212, the signaling processing unit 213 acquires and processes SLS signaling data corresponding to the service for which the channel is selected.

In step S213, the control unit 214 executes control of the demultiplexer 212, the decoder 217, etc. based on the SLS signaling data processed in the process of step S212, so that video delivered through broadcasting or communication, A stream of components, such as audio, is acquired and played. When the process of step S213 ends, the receiving process shown in Fig. 17 ends.

As above, the receiving process has been described.

(Emergency Information Response Process)

Finally, an emergency information response process executed by the receiving device 20 shown in FIG. 1 will be described with reference to a flowchart shown in FIG. 18 .

In step S231, the signaling processing unit 213 acquires the region mapping information separated by the demultiplexer 212. Area mapping information is included in ADT, FIT or EAT.

In step S232, the control unit 214 writes the region mapping information obtained in the process of step S231 into the memory 216.

The process of acquiring and recording area mapping information executed in steps S231 to S232 is executed in the initial scanning process, for example, when the receiving device 20 is a television receiver. Meanwhile, for example, when the receiving device 20 is a mobile receiver such as a smart phone, a region mapping information acquisition process is executed at every predetermined interval during movement.

In step S233, the control unit 214 acquires reception site information. As this receiving site information, for example, when the receiving device 20 is a fixed receiver such as a television receiver, an area code or the like set by the user during initial scanning or the like can be used. Meanwhile, for example, when the receiving device 20 is a mobile receiver such as a smart phone, position information (geo-location information) represented by a received signal received from a positioning satellite such as GPS may be used.

In step S234, the demultiplexer 212 performs filtering (packet filtering) at the packet level under the control of the control unit 214.

In this packet filtering, the LLS header of the LLS packet is monitored, whether the type information (Type) indicates EAT or not is monitored, and the receiving site represented by the receiving site information obtained in the process of step S233 is extended information (Type extension) is included in the EA target region A2 represented by the target region tag arranged in

However, in the receiving device 20, the area where the receiving site represented by the receiving site information obtained in the process of step S233 is set by the user, the position information represented by the received signal received from the GPS (geo-location information), and the like. Since it is a code, it is difficult to directly perform matching between the receiving site and the target area tag arranged in the LLS header. Therefore, the receiving device 20 reads the area mapping information recorded in the memory 216 in the process of step S232, converts the area code or geo-location information into a target area tag, and converts the area code or geo-location information into a target area tag arranged in the LLS header. Let it be a common ID system, and then perform matching between the converted target area tag and the target area tag arranged in the LLS header.

In step S235, it is determined whether or not an EAT containing emergency information has been received as a result of the packet filtering performed in step S234. In step S235, if it is determined that the EAT containing emergency information has not been received, the process returns to step S233, and the processes of steps S233 to S235 are repeated. However, in step S233, if the content of the receiving site represented by the receiving site information has not changed, the process of step S233 may be skipped. Here, in the case of a fixed receiver, the receiving site does not change. Meanwhile, in the case of a mobile receiver, there is a possibility that the receiving site is changed.

On the other hand, if it is determined in step S235 that the EAT including emergency information has been received, the process proceeds to step S236.

In step S236, the emergency information processing unit 220 performs filtering (message filtering) at the message level under the control of the control unit 214.

In this message filtering, matching is executed to determine whether or not the receiving site represented by the receiving site information obtained in the process of step S233 is included in the EA target detailed region A3 represented by the target detailed region code of the EAT.

In step S237, as a result of the message filtering performed in step S236, when an emergency information message targeted for the EA target detailed area A3 including the receiving site represented by the receiving site information obtained in the process of step S233 is detected. , the emergency information processing unit 220 displays an emergency information message. When the process of step S237 ends, the emergency information response process shown in Fig. 18 ends.

As above, the emergency information response process has been described. In this emergency information response process, the area mapping information transmitted from the transmitting device 10 is acquired and recorded before the emergency information, and in case of an emergency, filtering (packet filtering and message filtering) is based on using the recorded area mapping information. is executed on a per-area basis by Accordingly, the receiving device 20 performs filtering in units of regions, and only emergency information suitable for the receiving site is acquired from among emergency information notified in each region, and thus useful information can be presented (notified) to the user.

In the description presented above, the case where packet filtering and message filtering are performed as filtering by area has been described, but the receiving device 20 may perform at least one of packet filtering and message filtering.

<7. Modified example>

In the description presented above, ATSC used by the United States and the like is described as a standard for terrestrial digital television broadcasting, but the present technology is a system used by Japan and the like, ISDB (Integrated Services Digital Broadcasting), a system used by European countries. It can be applied to DVB (Digital Video Broadcasting), etc. In addition, the present technology is not limited to terrestrial digital television broadcasting, and can be used for satellite digital television broadcasting, digital cable television broadcasting, and the like. Also, in the description presented above, the case where an IP transmission system such as ATSC 3.0 is employed has been described, but the present technology can be applied to an MPEG2-TS system.

In the description presented above, as the name of signaling data, "T", an abbreviation of "Table", is mainly used, but there are cases in which "D", an abbreviation of "Description", is used. For example, an Emergency Alerting Table (EAT) can be described as an Emergency Alerting Description (EAD). However, the difference in names is a difference in the form of "table" and "description", and there is no difference in the actual content of signaling data (meta data).

In the description presented above, elements and attributes have been described in the case where signaling data is described by a markup language such as XML, but the names of elements and attributes are examples, and other names may be used. For example, there are cases in which a broadcast stream ID defined in FIT, EAT, etc. is referred to as a network ID, an RF allocation ID, an RF channel ID, and the like. do. However, the difference between these names is a difference in form, and there is no difference in the actual content of these elements or attributes. Also, the aforementioned LLS meta data and SLS meta data are examples, and any other meta data may be configured to be included.

In the transmission system 1 shown in FIG. 1, a configuration in which broadcast waves of digital broadcasting transmitted from the transmission device 10 are directly received by the reception device 20 is shown, but one or a plurality of broadcast waves of digital broadcasting are shown. It may be transmitted through a relay station (not shown in the figure). Further, in the transmission system 1 shown in FIG. 1, when the receiving device 20 is a mobile receiver, the receiving device 20 accesses the Internet 90 through an access point of a public wireless local area network (LAN). or is connected to the server 30 through a mobile network (not shown) such as LTE (Long Term Evolution) or LTE-Advanced.

In the transmission system 1 shown in Fig. 1, there are cases where the receiving device 20 does not have a communication function, or the receiving device 20 has a disabled communication function. In this case, it is difficult for the receiving device 20 to access the server 30. In FIG. 1, for simplicity of explanation, the server 30 is shown as delivering all data, signaling data, and data of applications, web pages, and the like, of streams of components such as video and audio, but data of streams of components and Signaling data and application data may be transferred from different servers.

In the description presented above, the case where geo-location information is obtained as location information represented by a received signal received from a positioning satellite such as GPS has been described, but based on connection information with an access point of a public wireless LAN, for example Any other method capable of designating the current position of the user, such as a method of acquiring a place that can be designated by using an IP address or a method of acquiring position information of a user through a search of a database using an IP address, can be used.

Although the ADT shown in FIG. 11 has been described as an independent table constituting LLS signaling data as described above, region mapping information included in the ADT may be included as an element of any other table such as FIT or EAT. For example, in the EAT shown in FIG. 12, as an element at the same level as the level of the AutomaticTuningService element, after the adt element of the ADT shown in FIG. 11 is included as an optional element, and then, LLS index information (signaling index) In , the target area tag (Area_tag) of the extension information (type extension) shown in Fig. 9 is set to "0x00" for the EAT that transmits only the adt element, and the EAT is transmitted. Therefore, the receiving device 20 first acquires the EAT designated as the target area tag (Area_tag) = "0x00", and then, emergency information in which a specific target area tag (area code) is set in the target area tag (Area_tag) An operational form of acquiring an EAT including a message (EAMessage) may be used.

<8. Computer Configuration>

The series of processes described above may be performed by hardware or software. When a series of processes are performed by software, programs constituting the software are installed on a computer. Fig. 19 is a diagram showing an example of the hardware configuration of a computer that executes the series of processes described above by using a program.

In a computer 900, a central processing unit (CPU) 901, a read only memory (ROM) 902, and a random access memory (RAM) 903 are interconnected via a bus 904. Also connected to bus 904 is an input/output interface 905 . An input unit 906 , an output unit 907 , a recording unit 908 , a communication unit 909 and a drive 910 are connected to the input/output interface 905 .

The input unit 906 is constituted by a keyboard, mouse, microphone and the like. The output unit 907 is constituted by a display, a speaker, and the like. The recording unit 908 is constituted by a hard disk, non-volatile memory, or the like. The communication unit 909 is constituted by a network interface or the like. The drive 910 drives a removable medium 911 such as a magnetic disk, optical disk, magneto-optical disk or semiconductor memory.

In the computer 900 configured as described above, for example, the CPU 901 stores programs recorded in the ROM 902 or the recording unit 908 through the input/output interface 905 and the bus 904 in the RAM ( 903) and executes the loaded program, thereby executing the foregoing series of processes.

For example, a program executed by the computer 900 (CPU 901) may be provided while being recorded on the removable medium 911 as a package medium or the like. Also, the program may be provided through a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

In the computer 900, by loading the removable medium 911 into the drive 910, the program can be installed to the recording unit 908 through the input/output interface 905. Also, the program may be received by the communication unit 909 via a wired or wireless transmission medium and installed in the recording unit 908. Also, the program may be installed in the ROM 902 or the recording unit 908 in advance.

Here, in this specification, the process executed by the computer based program is not necessarily executed according to the order described in the flowchart. That is, processes executed by a computer based program include processes executed in parallel with each other or processes executed separately (eg, parallel processes or processes using objects). Also, the program may be processed by one computer (processor) or by a plurality of computers in a distributed manner.

In addition, the present technology is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present technology.

This technology can be configured as follows.

(One)

As a receiving device,

comprising a circuit, wherein the circuit comprises:

receive area mapping information comprising at least one target area identifier and, for each of the at least one target area identifier, location information associated with each target area identifier;

and control filtering so that emergency information for a location associated with the receiving device is acquired based on the area mapping information.

(2)

The receiving device according to (1), wherein the area mapping information is associated with one or more areas.

(3)

The receiving device according to (1) or (2), wherein the circuitry is configured to convert a location associated with the receiving device into one of the at least one target area identifier based on the area mapping information.

(4)

In any of (1) to (3),

each of the at least one target area identifier is a target area tag used to identify an area targetable by emergency information;

The location information for each of the at least one target area tag is an area code assigned to a predetermined area disposed inside the area represented by each target area tag or a predetermined area corresponding to the area represented by each target area tag. A receiving device comprising at least one of position information representing a position.

(5)

The receiving device according to any one of (1) to (4), wherein the circuitry is configured to filter packets containing emergency information in units of target regions.

(6)

The receiving device according to any one of (1) to (5), wherein the circuitry is configured to filter one or a plurality of messages included in the emergency information in units of target regions.

(7)

The receiving device according to (6), wherein the circuitry is configured to filter the plurality of messages based on a service provider associated with at least one of the plurality of messages.

(8)

The receiving device according to (6) or (7), wherein the circuitry is configured to filter the plurality of messages based on the priority level of at least one of the plurality of messages.

(9)

The receiving device according to any one of (1) to (8), wherein the location associated with the receiving device is an area set by a user or a position indicated by a received signal received from a positioning satellite.

(10)

In any of (1) to (9),

A receiving device, further comprising a receiver configured to receive a digital broadcast signal transmitted using an Internet Protocol (IP) transmission system.

(11)

In (10),

The IP transmission system complies with ATSC (Advanced Television Systems Committee) 3.0,

The receiving device, wherein the emergency information and area mapping information are transmitted in a layer lower than an IP layer in a protocol stack of an IP transmission system.

(12)

A method of a receiving device for acquiring emergency information, the method comprising:

receiving, by circuitry of a receiving device, area mapping information including at least one target area identifier and, for each of the at least one target area identifier, location information associated with each target area identifier; and

and controlling, by circuitry, filtering so that emergency information for a location associated with the receiving device is acquired based on the area mapping information.

(13)

As a transmitting device,

comprising a circuit, wherein the circuit comprises:

generate region mapping information including at least one target region identifier and, for each of the at least one target region identifier, location information associated with each target region identifier;

receive content;

transmit content and region mapping information;

and transmit emergency information when an emergency situation occurs in an area represented by one of the at least one target area identifier.

(14)

The transmitting device according to (13), wherein the region mapping information is associated with one or more regions.

(15)

The transmitting device according to (13) or (14), wherein the area mapping information is used to convert a location associated with a receiving device receiving the area mapping information and content into one of the at least one target area identifier.

(16)

In any of (13) to (15),

each of the at least one target area identifier is a target area tag used to identify an area targetable by emergency information;

The location information for each of the at least one target area tag is an area code assigned to a predetermined area disposed inside the area represented by each target area tag or a predetermined area corresponding to the area represented by each target area tag. A transmitting device comprising at least one of position information expressing a position.

(17)

The transmitting device according to any one of (13) to (16), wherein the area mapping information is used for filtering packets containing emergency information on a target area basis.

(18)

The transmitting device according to any one of (13) to (17), wherein the area mapping information is used for filtering one or a plurality of messages included in the emergency information on a target area basis.

(19)

The sending device according to (18), wherein the plurality of messages are filtered based on a service provider associated with at least one of the plurality of messages.

(20)

The transmitting device according to any of (18) to (19), wherein the plurality of messages are filtered based on a priority level of at least one message of the plurality of messages.

(21)

The transmitting device according to any of (13) to (20), wherein the location associated with the receiving device is an area set by a user or a position indicated by a received signal received from a positioning satellite.

(22)

The transmission device according to any one of (13) to (21), wherein the circuitry is configured to transmit the digital broadcast signal using an IP (Internet Protocol) transmission system.

(23)

In (22),

The IP transmission system complies with ATSC 3.0,

wherein the emergency information and area mapping information are transmitted in a layer lower than an IP layer in a protocol stack of an IP transmission system.

(24)

A method of a transmitting device for transmitting emergency information, the method comprising:

generating, by circuitry of a transmitting device, area mapping information including at least one target area identifier and location information associated with each target area identifier for each of the at least one target area identifier;

receiving content;

transmitting, by circuitry, content and area mapping information; and

and transmitting, by circuitry, emergency information when an emergency situation occurs within an area represented by one of the at least one target area identifier.

(25)

As a receiving device,

a receiving unit that receives broadcast waves of digital broadcasting using an Internet Protocol (IP) transmission system;

an acquisition unit that acquires area mapping information associating information about the area with emergency information notified to each area by using a broadcast wave; and

and a control unit which controls filtering so that emergency information appropriate for the receiving position of the broadcast wave is acquired among the emergency information notified to each region based on the region mapping information.

(26)

In (25), the area mapping information is information used for converting the reception position of a broadcast wave into a format suitable for filtering in units of areas.

(27)

In (26), the area mapping information includes a target area tag used to identify the area to which emergency information is notified, an area code assigned to each predetermined area disposed inside the area represented by the target area tag, and and associating at least one of position information representing a predetermined position corresponding to the zone represented by the target region tag.

(28)

The receiving device according to any one of (25) to (27), wherein the control unit filters packets storing emergency information in units of areas.

(29)

The reception device according to any one of (25) to (28), wherein the control unit filters one or a plurality of messages included in the emergency information in units of areas.

(30)

The receiving device according to (29), wherein the control unit filters the messages for each service provider providing the service.

(31)

The receiving device according to (29), wherein the control unit filters the messages based on priority levels of the messages.

(32)

The reception device according to any one of (25) to (31), wherein the reception position of the broadcast wave is information about an area set by a user or position information expressed by a received signal received from a positioning satellite.

(33)

According to any of (25) to (32),

The IP transmission system complies with ATSC (Advanced Television Systems Committee) 3.0,

The receiving device, wherein the emergency information and area mapping information are transmitted in a layer lower than an IP layer in a protocol stack of an IP transmission system.

(34)

As a receiving method for a receiving device, the receiving method using the receiving device comprises:

receiving broadcast waves of digital broadcasting using an IP transmission system;

acquiring area mapping information for associating emergency information notified to each area with information about the area by using a broadcast wave; and

and controlling filtering so that emergency information appropriate for a receiving position of a broadcast wave is obtained among emergency information notified to each region based on the region mapping information.

(35)

As a transmitting device,

a generating unit that generates area mapping information associating information about the area with emergency information notified to each area by using a broadcast wave of the IP transmission system;

an acquisition unit that acquires content; and

and a transmitting unit that transmits content and region mapping information using broadcast waves, and transmits emergency information in case of an emergency situation.

(36)

The transmitting device in (35), wherein the area mapping information is information used for converting a receiving position of a broadcast wave in a receiving device that receives a broadcast wave into a format suitable for filtering in units of areas.

(37)

In (36), the area mapping information includes a target area tag used to identify the area for which emergency information is notified, an area code assigned to each predetermined area disposed inside the area represented by the target area tag, and and associating at least one of position information representing a predetermined position corresponding to an area represented by the target area tag.

(38)

The transmitting device according to any of (35) to (37), wherein the area mapping information is used for filtering packets storing emergency information on a per area basis.

(39)

The transmitting device according to any one of (35) to (38), wherein the area mapping information is used for filtering one or a plurality of messages included in the emergency information on a per area basis.

(40)

The transmitting device as in (39), wherein the messages are filtered for each service provider providing the service.

(41)

A transmitting device as in (39), wherein messages are filtered based on their priority levels.

(42)

The transmitting device according to any one of (36) to (41), wherein the receiving position of the broadcast wave is information about an area set by a user or position information expressed by a received signal received from a positioning satellite.

(43)

The method of any of (35) to (42), wherein the IP transmission system complies with ATSC 3.0;

wherein the emergency information and area mapping information are transmitted in a layer lower than an IP layer in a protocol stack of an IP transmission system.

(44)

As a transmission method for a transmission device, the transmission method using the transmission device comprises:

generating area mapping information for associating emergency information notified to each area with information about the area by using a broadcast wave of the IP transmission system;

acquiring content; and

and transmitting content and region mapping information using broadcast waves, and transmitting emergency information in case of emergency.

1 transmission system
10 sending device
20 receiving device
30 servers
80 transmit channels
90 internet
111 component acquisition unit
113 Signaling Generation Unit
115 area mapping information generation unit
116 emergency information generating unit
117 multiplexer
118 sending unit
211 tuner
212 Demultiplexer
213 signaling processing unit
214 control unit
216 memory
218 display unit
219 speaker
220 emergency information processing unit
221 communication unit
900 computer
901 CPU

Claims (27)

As a receiving device,
comprising a circuit, said circuit comprising:
Receive an emergency alert message in XML format including message priority and at least one target region information through a broadcast signal, wherein each of the at least one target region information is location information in a location element of the emergency alert message and the location includes type information in the type attribute of an element, and the location information includes a geographic code;
configured to control filtering such that emergency information for a location associated with the receiving device is obtained based on at least one geographic code and the type information;
the type information indicates a format type of the at least one geographic code;
The emergency alert message includes a service identifier of an emergency related audio/visual service and URL information of emergency content associated with the emergency alert message,
one of the formats of the location information corresponds to an area with a boundary defined by a set of location coordinates;
The location information includes latitude and longitude defining an area. The receiving device according to claim 1, wherein the emergency alert message is associated with one or more areas. The receiving device according to claim 1, wherein the circuitry is configured to identify one of the at least one target area information based on the location associated with the receiving device. According to claim 1,
Each of the at least one piece of target area information includes target area information used to identify an area targetable by the emergency information;
wherein the location information for each of the at least one piece of target area information includes at least one of area codes assigned to a predetermined area disposed inside an area represented by each piece of target area information. The receiving device according to claim 1, wherein the circuitry is configured to filter the packets including the emergency information in units of target regions. The receiving device according to claim 5, wherein the circuitry is configured to filter one or a plurality of messages included in the emergency information in units of the target region. 7. The receiving device according to claim 6, wherein the circuitry is configured to filter the plurality of messages based on a service provider associated with at least one of the plurality of messages. The receiving device according to claim 1, wherein the circuitry is configured to filter the emergency alert message based on the message priority. The receiving device according to claim 1, wherein the location associated with the receiving device is an area set by a user or a position indicated by a received geo-location signal. According to claim 1,
a receiver configured to receive a broadcast signal transmitted using an Internet Protocol (IP) transmission system;
wherein the broadcast signal is a digital television broadcast signal. According to claim 10,
The IP transmission system complies with ATSC (Advanced Television Systems Committee) 3.0,
Wherein the receiver is configured to receive the emergency information and the location information from the IP transmission system. According to claim 1,
the type information indicates one of a plurality of different format types;
wherein the circuitry is configured to determine an area indicated by the geographic code according to the one of the plurality of different format types indicated by the type information. According to claim 1,
The emergency alert message is included in an emergency information table, the emergency information table is in XML format,
wherein the service identifier, the URL information, and the message priority are indicated by different elements in the emergency information table. The receiving device according to claim 1, wherein the emergency alert message includes text of the emergency alert message to be displayed. The receiving device according to any one of claims 1 to 14, wherein the receiving device is a television receiver. The receiving device according to claim 15, wherein the receiving device includes a display unit. As a method of a receiving device for acquiring emergency information,
Receiving an emergency alert message in XML format including message priority and at least one target region information through a broadcast signal by a circuit of the receiving device, each of the at least one target region information of the emergency alert message includes location information in a location element and type information in a type attribute of the location element, wherein the location information includes a geographic code; and
controlling, by the circuitry, filtering so that emergency information for a location associated with the receiving device is acquired based on at least one geographic code and the type information;
the type information indicates a format type of the at least one geographic code;
The emergency alert message includes a service identifier of an emergency related audio/visual service and URL information of emergency content associated with the emergency alert message,
one of the formats of the location information corresponds to an area with a boundary defined by a set of location coordinates;
Wherein the location information includes latitude and longitude defining an area. 18. The method of claim 17, wherein the emergency alert message is associated with one or more regions. According to claim 17,
and identifying one of the at least one target area information based on the location associated with the receiving device. According to claim 17,
Each of the at least one piece of target area information includes target area information used to identify an area targetable by the emergency information;
The method of claim 1 , wherein the location information for each of the at least one piece of target area information includes at least one of an area code assigned to a predetermined area disposed inside an area represented by each piece of target area information. 18. The method of claim 17, wherein controlling the filtering comprises:
And filtering packets including the emergency information in units of target regions. 18. The method of claim 17, wherein controlling the filtering comprises:
And filtering one or a plurality of messages included in the emergency information in units of the target region. 18. The method of claim 17, wherein controlling the filtering comprises:
and filtering the plurality of messages based on a service provider associated with at least one of the plurality of messages. 18. The method of claim 17, wherein controlling the filtering comprises:
and filtering the emergency alert message based on the message priority. 18. The method according to claim 17, wherein the location associated with the receiving device is an area set by a user or a position indicated by a received geo-location signal. According to claim 17,
further comprising receiving, by a receiver, the broadcast signal transmitted using an Internet Protocol (IP) transmission system;
wherein the broadcast signal is a digital television broadcast signal. The method of claim 26,
The IP transmission system complies with ATSC (Advanced Television Systems Committee) 3.0,
The method further comprises receiving, by the receiver, the emergency information and the location information from the IP transmission system.

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